Todays find, 1941 book called "Model Gasoline Engines". Great information on classic model planes, tether cars, and hydroplanes. Amazing illustrations and (rare for this type book) lots of photographs. One thing I found interesting was there was a disclaimer stating that the book complied with bulk paper restictions. This was leading up to our involvement in WWII. I think this is a first (and probably only) edition.

A little research found the Raymon F. Yates (the author) was the father of Brock Yates, writer for Car and Driver for years and one of the founding fathers of the "Cannonball Run".